Peptide index

An oral ghrelin-receptor agonist approved in Japan for cancer cachexia, which reliably increases appetite, body weight and lean mass but has never shown a matching improvement in strength or survival.

Growth Hormone Secretagogues & GHRH Analogues

A modified C-terminal fragment of growth hormone marketed for fat loss without GH's effects on blood sugar or IGF-1, which is true - but the human weight-loss data is essentially negative.

Growth Hormone Secretagogues & GHRH Analogues

A GHRH analogue carrying a maleimide linker that binds covalently to serum albumin, converting a 30-minute peptide into one that raises GH and IGF-1 for the better part of a week.

Growth Hormone Secretagogues & GHRH Analogues

A short-acting GHRH(1-29) fragment with four amino-acid substitutions that resist enzymatic breakdown, almost always injected alongside a GHRP such as ipamorelin to produce a large synchronised GH pulse.

Growth Hormone Secretagogues & GHRH Analogues

The endogenous 28-amino-acid stomach hormone that every GHRP in this class is imitating, used almost exclusively as a research tool because its short half-life and octanoyl modification make it impractical as a drug.

Growth Hormone Secretagogues & GHRH Analogues

An early-generation GH-releasing heptapeptide from the same Bowers series as GHRP-6, almost entirely displaced by ipamorelin and GHRP-2 and rarely worth sourcing today.

Growth Hormone Secretagogues & GHRH Analogues

A strong GH-releasing hexapeptide that produces a bigger pulse than ipamorelin, at the cost of moderate appetite stimulation and some cortisol and prolactin drift.

Growth Hormone Secretagogues & GHRH Analogues

The original GH-releasing peptide, best known now for the ferocious hunger it produces alongside GH release, which makes it useful for hard gainers and unusable during a cut.

Growth Hormone Secretagogues & GHRH Analogues

The most potent of the classical GH-releasing hexapeptides, with genuinely interesting cardioprotective activity through CD36, but also the fastest to desensitise its own receptor.

Growth Hormone Secretagogues & GHRH Analogues

The unmodified lipolytic C-terminal fragment of human growth hormone and the parent of AOD-9604, sold heavily for fat loss on the strength of mouse studies and very little else.

Growth Hormone Secretagogues & GHRH Analogues

A highly selective pentapeptide ghrelin-receptor agonist that produces a clean growth hormone pulse without meaningfully raising cortisol, prolactin or hunger, which is why it became the default GHRP in modern stacks.

Growth Hormone Secretagogues & GHRH Analogues

The single most commonly compounded and most widely sold peptide combination, pairing a GHRH analogue with a selective ghrelin-receptor agonist so the two arms of GH control fire together for a much larger pulse than either produces alone.

Growth Hormone Secretagogues & GHRH Analogues

A weekly growth hormone prodrug in which unmodified somatropin is slowly released from an inert PEG carrier by a self-cleaving linker, so the drug that reaches the receptor is ordinary GH.

Growth Hormone Secretagogues & GHRH Analogues

An orally active ghrelin-receptor agonist approved specifically as a single-dose diagnostic test for adult growth hormone deficiency, replacing the unpleasant and risky insulin tolerance test.

Growth Hormone Secretagogues & GHRH Analogues

An orally bioavailable non-peptide ghrelin mimetic that raises GH and IGF-1 around the clock from a single daily capsule, with appetite, water retention and worsened insulin sensitivity as the standing trade-offs.

Growth Hormone Secretagogues & GHRH Analogues

The native 29-amino-acid active fragment of human GHRH, and the most clinically established and most commonly physician-prescribed growth hormone secretagogue in the United States.

Growth Hormone Secretagogues & GHRH Analogues

A once-weekly growth hormone analogue that binds reversibly to albumin to stretch a daily injection into a weekly one, approved for both adult and paediatric growth hormone deficiency.

Growth Hormone Secretagogues & GHRH Analogues

A once-weekly growth hormone fusion protein carrying three copies of the hCG C-terminal peptide, which extend its half-life enough to replace daily injections in children with GH deficiency.

Growth Hormone Secretagogues & GHRH Analogues

Recombinant 191-amino-acid human growth hormone itself - the reference standard every secretagogue in this class is measured against, and the only one with decades of registration-grade efficacy and safety data.

Growth Hormone Secretagogues & GHRH Analogues

An early orally active growth hormone secretagogue from Novo Nordisk that worked but was abandoned when it turned out to inhibit CYP3A4 and raise liver enzymes - historically important, practically obsolete.

Growth Hormone Secretagogues & GHRH Analogues

The only FDA-approved GHRH analogue, a stabilised full-length GHRH(1-44) that specifically strips visceral abdominal fat without the appetite or glucose penalties of most fat-loss drugs.

Growth Hormone Secretagogues & GHRH Analogues